Double (Cold) Reduced (DR)
1) Material that has been cold reduced in thickness twice. The first reduction is at the tandem Mill (where it is reduced at five different locations) and the second is at the Weirlite Mill. 2) Plate given a second major cold reduction following annealing. Double reduced products are relatively hard, have limited ductility, and highly directional mechanical properties. Aim Rockwell hardness 30T hardness is 76; Aim yield strength (varying from materials) is 80,000 psi to 90,000 psi; approximate tensile strength is 90,000 psi.
